西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (6): 85-105.DOI: 10.11885/j.issn.1674-5086.2018.07.18.03

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Microscopic Pore Structure Characterization and Fluids Transport Visualization of Reservoir Rock

SONG Rui1,2, WANG Yao1, LIU Jianjun1,2   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan, 610500, China;
    2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan, Hubei 430071, China
  • Received:2018-07-18 Online:2018-12-01 Published:2018-12-01

Abstract: The techniques for pore structure acquiring and characterization are divided into two types:indirect testing and direct testing. The former consist of the fluid injection method and the inverse analysis method which obtain the statistic parameters such as pore size distribution. The latter are mainly the optics and radiation methods which obtain the image of pore structure directly. The micro-seepage physical experiment plays an important role in the mechanical mechanism study on pore-scale complex transport behaviors during the seepage and displacement process, and can realize visual monitoring and capture of fluid shape and distribution in pore space, which are difficult to obtain under macroscopic condition. The pore-scale model reconstruction method based on the pore structure images is a numerical modelling process for visual study on pore structure characterization and transport properties prediction. According to the different representation scales, the governing equations of fluid flow in porous media can be divided into the Molecular Dynamics (MD), the Lattice Boltzmann method (LBM) and the Computational Fluid Dynamics (CFD). Besides, the Poiseuille law and quasi-static model are commonly utilized to model fluid flow and displacement process in pore network model.

Key words: porous media, digital rock, pore structure, multi-scale, seepage mechanics

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